Passage I
Lyme disease is caused by bacteria that are transmitted to humans by the bite of infected deer ticks. The first sign of Lyme disease is often a bull's-eye rash on the skin. Figure 1 shows the 2-year deer tick life cycle.
Figure 1 adapted from "Deer Tick Eco logy." ©1998 by the American Lyme Disease Foundation, Inc.
A study area adjacent to a forest was divided in to 5 zones (A- E), People living in the study area were tested monthly for Lyme disease. The results are shown in Figure 2. For each zone, Table 1 shows the number of houses, mice, deer tick larvae per mouse, households that sighted deer daily, and the percent of households inhabited by at least 1 person infected with Lyme disease.
Figure 2 and Table 1 adapted from Catherine C. Latavica et al., "Rapid Emergence of a Focal Epidemic of Lyme Disease i n Coastal Massachusetts“ ©1989 by The Massachusetts Med ical Society.
4. Suppose additional data had been obtained about the total number of infected deer tick larvae in each of the zones. Given Table 1, one would predict that the largest total of infected deer tick Iarvae would have been found in which zone?
Your Answer is
Correct Answer is F
Explanation
From table 1, it can be seen that the proportion of human infection in Zone A is the highest, so it is speculated that Zone A has the most infected larvae